Lamp construction



March 17, 1931. F. BUCHANAN ET AL 1,796,313

' LAuP CONSTRUCTION Filed Jan. 8, 1929 4 Sheets-Sheet 1 IN VEN TORSATTORNEY March 17, 1931. BUCHANAN ET AL 1,796,318

LAMP GONSTRUC TI 0N Filed Jan. 8, 1929 4 Sheets-Sheet 3 INVENTORS ATTORNEY.

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Patented Mar. 17, 1931 PATENT oFFieE FRANK BUCHANAN AND ROYAL E. FSYRACUSE, NEW YGRK, ASSIGNORS YORK A C'GBPORATEON OF NEW LAIVIP CGIIST'QJUCTION,

Application filed. January 8, 1929. Serial No. 331,010.

This invention relates to lamas aarticular- 1 1y lamps for illuminatinglarge areas as air its and has for its ob ect a particularly simple2111C rigid construction for large lamps 1 suitable for field and Lilport illumination like characters designate corresponding parts in allthe views. 7

Figure 1 is a side elevation of this air port lamp, contiguous portionsof a support or pillar being also shown.

Figure 2 is a side elevation, partly broken away, showing the base inits open position and also the light deflector as swung outwardly.

Figure 3 is an enlarged plan view, partly broken away.

Figure 4: is a fragmentary, enlarged side elevation, partly broken away,of the base of the lamp showing the lamp mechanism therein.

Figure 5 is an enlarged transverse sectional view on line 55, Figure 1showing the lower member of the body in plan.

Figure 6 is a plan view of the parts seen in Figure 4.

Figure 7 is an elevation of the detached lamp mechanism.

Figure 8 is a sectional view on line 88, Figure 7.

Figure 9 is a fragmentary sectional detail view taken on the plane ofline 99, Figure 5.

This lamp is of the general type shown in U. S. Letters Patent No.1,673,100 issued June 12, 1928, The lamp comprises generally, a bod openat its bottom, a reflector carried by the body, a base normally closingthe open bottom of the body, lamp mecha-- nism carried by the base andoperable to adjust the lamp in juxtaposition with the re flector or thefocus thereof, the base being movable vertically to carry the lamp intoand out of the body and reflector, and means con necting the base andthe body to support the base and guide the same during its movement.

As here illustrated, the body includes upper and lower members 1 and 2,a reflector between said members, the lower member being open and a base3 having means for carrying a lamp a, the base 3 being movablevertically to carry the lamp through the lower member into and out ofjuxtaposition to the reflector. The reflector is preferably the rearside of a globe 5 of the form shown in the patent above referred to.

The globe 5 is secured at its ends by semicircular clamping rings 6 and7 the upper clamping ring 6 being secured to the upper frame member 2 byscrews 8 ant the lower member being secured by screws 9 to the lowerframe member 2. The members 1, 2 are connected by posts or bars 10located behind the portion of the globe which forms the reflector, andthe upper member 1 is secured to the bars 10 as by screws 11, the postsor bars being here shown as tubes, Figure 2, threading into the lowermember, and the screws 11 which secure the upper member 1 to the poststhread into plugs 11 in the upper ends of the posts.

A casing 12 enclosed the reflector part of the globe and the bars 10.The casing is fitted between the top and bottom members 1, 2 and issemi-cylindrical in form and in cludes front plates 12 arrangeddiametrically of the globe and conforming thereto.

The upper member 1 is provided with a visor 13 extending forwardly andoverhanging the front side of the globe and a rearwardly extending capportion 14 closing the upper end of the casing 12.

A plurality of horizontally extending deflectors 15 are suspended fromthe visor by arms 16 which are pivoted at 17 to the visor, thesedeflectors having circular cut-0uts to conform to the front half of theglobe. The deflectors can be swung out of their operative position forthe purpose of locating the lamp or lamp filament relatively to thefocus of the reflector and for removing and inserting the globe.

The deflectors are provided with lugs 18 for coacting with pivot screws19 on the frame members 10 securing the deflectors in their operativeposition.

The lower frame member 2 is provided with a bracket 20 on the rear sidethereof or in any suitable location outside of the path of the opening dclosing movement of the base 3. wh ch bracket is formed with means forattachment to a pillar or support 21, it being here shown as providedwith a socket for receiving the upper end of a post 21.

The base 3 is connected to the body 1 or the lower member 2 by meanswhich permit it to be lowered and raised vertically to carry the lampout of and into the body. As here illustrated. he base 3 is cylindricalin general form and formed with an upper portion 23 which telescopesinto the lower member 2 and a lower portion 24, these two portions beingseparated by a horizontal partition 25. The base is also provided with aflange which seats against the lower side of the frame member 2.

The connections between the base and the body are preferably guide rods27 connected at their lower ends to lugs 28 on opposite sides of thebody 3 and extending through guide openings 29 in the lower frame member2, these rods extending upwardly into two of the tubular posts 10. Thereare three of these posts 10, two of which are located on opposite si esof the globe 5 nearly diametrically opposite each other. The guide orsuspension rods 27 telescope into these two posts. The rods are providedwith shoulders 30 at their upper ends and butter springs 31 areinterposed between the shoulder and the member 2. These rods support thebase 3 when it is in open position and guide the base during its openingand closing movement.

The base is held in closed position by any suitable latch means as pivotscrews 33 pivoted to the frame member 2 and movable into and out ofnotches in lugs 84 on the base memher.

The base member 3 is also former with an offset boxlilre portion largeenough to receive a terminal block 35 connected by wires 35 to the lampsocket terminal or the terminals of any other lamp support if a socketis not used. The bonlike portion 85 is complemental to a similarboxlilre portion 2 on the member 2. A terminal block 2 is located. inthe be); portion of the member 2 t9 the terminals of which the feedwires 36 are connecte l. The blocks 35 and 2 are formed with coactingcontacts 35 and 2 which separate and break the circuit when the basemember 3 is lowered in the position shown in Figure 2.

The lamp mechanism is carried in the upper conipartment 23 of the base 3and is ad justable in a plurality of directions to move the lampvertically and laterally in a plurality of directions to locate it injuxtapositioi. to the focal point of the reflector. This n echanismcompriss a carrier 40 fulcrumed a raised fulcrum point 41 on thepartition and means acting on the carrier at points locate-fl indifferent radii relatively to the to crum point 41., which radii arearranged at an angle and perferably an acute angle hor zontally in allhorizontal directions.

The springs 46 47 encircle studs 48, 49 extending through the carrier 40and threadi into the partition 25 and are interposed bit. en heads ornuts 50, 51 on the studs 48, 49 and the carrier 40 or the arms 42, 43thereof.

The studs 48, 49 preferably extend through t 1e arms 42, 43 of thecarrier between its fulcrum point 41 and the adjusting screws 4 The lampis adjusted vertically by ears of a support movable vertically. that is.at an angle to the plane of the carrier 40, being movable along uprightguides or recs 52 on the carrier, by means of a screw 5'. threadingthrough the carrier and connected to the support.

11 guide rods 52 are secured at their lower ends in the carrier 40 andat their upper ends in a yoke 52 supported on the carrier by The supportis so arranged that the blocks 51 which carry the lamp is mounted at anincline out of the vertical so that the lamp filament is locatedsomewhere near the focal point of the reflector. The accurate locationof the filament. after the lamp is adjusted to the proper height isdetermined by operating: the screws 44. 45 to tilt the carrier. Thesupport 51 is provided with spaced apart spring pressed roller bearings55 in each guide rod 52.

The ad usting screws for the carrier and the support have handleslocated in the compartment of the base below the partition 25.compartment is provided with a hinged 5G hich is held in its closedposition 3y pivot screw 57 cooperating with a notched 112;; 58 on thecover. The cover 56 may be locired in its closed position and also thebase 3 located in its closed position by means common to both of them asa bar 60 depending from the member 3 and extending through a lug 61 inthe margin of the cover, the bar having a hole 62 for receiving a.suitable lock member as the hasp of a padlock.

(lbviously, by manipulating the screws 44, 45 and 53 to tilt the carrieron its fulcrum point 41 and to move the lamp or support vertically, thelamp filament can be located accurately in the focus of the reflector.

This lamp construction is rigid and strong and consists of but few partsand is particularly adapted for large, heavy lamp units for field or airport illumination.

l/Vhat we claim is:

1. A lamp comprising a body, a globe carried by the body, the body beingopen at its lower side, a base having means for supporting a lamp, thebase normally closing the open side of the body and movable verticallyto carry the lamp into and out of the globe, and means for holding thebase in its normal position, the body being formed with a visoroverhanging the globe and horizontal deflectors depending from the visorin front of the globe and movable toward and from the globe.

2. A lamp comprising a body, a globe carried by the body, the body beingopen at its lower side, a base having means for supporting a lamp, thebase normally closing the open side of the body and movable verticallyto carry the lamp into and out of the globe, and means for holding thebase in its normal position, the body being formed with a visoroverhanging the globe and horizontal deflectors depending from the visorin front of the globe and movable toward and from the globe, thedeflectors having upwardly extending arms pivoted to the visors.

3. A lamp comprising a body including upper and lower members, a globeinterposed between said members, the globe having a rear reflectorportion, bars connecting said members and supporting the upper member,the bars being located in the rear of the reflector portion, the uppermember being formed with a forwardly extending visor overhanging thefront side of the globe and a rearwardly extending cap portion, a basenormally closing the lower member and having means for supporting alamp, and being movable vertically to carry the lamp into and out of thereflector of the globe through the lower member, and rods connecting thebase and the body, said rods extending through the lower member in therear of the reflector portion of the globe.

4. A lamp comprising a body and a refl ector carried by the body, abase, a rocking carrier fulcrumed on the base and having arms extendingat different radial angles to its fulcrum point and means acting on eachof said arms and operable independently of each other for rocking thecarrier on its fulcrum, the carrier having means for supporting a lamp.

5. A lamp comprising a body and a reflector carried by the body, a base,a rocking carrier fulcrumed on the base and having arms extending atdifferent radial angles to its fulcrum point and means acting on each ofsaid arms and operable independently of each other for rocking thecarrier on its fulcrum, a lamp support mounted on the carrier andadjustable toward and from the same, and means for adjusting thesupport.

6. A lamp comprising a body provided with a reflector, a base having afulcrum, a carrier mounted on the fulcrum, screws threading in the baseand thrusting against the carrier .at points located in different radiiarranged at an angle to each other, spring means acting on the carrierto resist movement thereof in one direction by the adjustring means andmeans carried by the carrier for supporting a lamp in uxtaposition tothe reflector.

7. A lamp comprising a body provided with a reflector, a base having afulcrum, a

carrier mounted on the fulcrum, screws threading in the base andthrusting against the carrier at points located in different radiiarranged at an angle to each other, spring means acting on the carrierto resist movement thereof in one direction by the adjusting means, alamp support carried by the carrier and movable in a direction at anangle thereto and means carried by the carrier for adjusting the lampsupport.

8. A lamp comprising a body having a reflector, a base, means carried bythe base for supporting the lamp in juxtaposition to the reflector, saidmeans comprising a carrier having a pair of radial arms arranged at anangle to each other, the carrier being fulcr-umed on the base at theangle of said arms, spring means acting on said arms to press thecarrier against its fulcrum point, and means operable independently ofeach other and acting on said arms to move the carrier on its fulcrumpoint.

9. A lamp comprising a body having a reflector, a base, means carried bythe base for supporting the lamp in juxtaposition to the reflector, saidmeans comprising a carrier having a pair of radial arms arranged at anangle to each other, the carrier being fulcrumed on the base at theangle of said arms, spring means acting on said arms to press thecarrier against the fulcrum point, and means operable independently ofeach other and acting on said arms to move the carrier on its fulcrumpoint, the carrier being formed with a guide arranged at an angle to theplane of said radial arms, a lamp support movable along the guide andmeans carried by the carrier for moving the lamp support along theguide.

10. A lamp construction comprising a. hotporting "icmbeis, the rearportion of the top me ber to the periphery of the portion of the lowermember, :5 lamp support and movable ntoand out of the depending ciror"the bottom member, and means the base and extending through the memberto guice the base into and f the bottom member.

11. fr lanp comprising a body including upper and lower member. and barsbetween said member... a concave reflector interposed between andabutting at its ends against said members, the lower member having anopening, a base nornally closing said opening and havin means forsupporting a lamp, the base being movable vertically to carry the lampinto and out of the reflector through the opening in the lower member,the upper member extending in the rear of the reflector and also to thefront thereof whereby it forms a hood overhanging the lamp, the lowermember having a front rim portion confining the greater part of the lampreceiving opening and a rearward segmental flange portion, said barsextending between the rear portions of the upper and lower members, andmeans for guiding the base, said means extending through said segmentalflange portion in the rear of the reflector.

12. A lamp comprising a lower member having means for adjustablymounting the same upon a support, an upper member, the rear portion ofwhich conforms to the rear portion of the lower member and the frontportion projecting forwardly to form a vizor for the lamp, uprightmembers connecting the upper member with the lower member, said membersalso having depending circular flanges in alinement, a reflector mountedbetween said flanges, a base movable into and out of the lower memberand having an adjustable lamp support and means extending outside of thebase for adjusting said lamp support without removing the base from thelower member.

18. A lamp construction comprising a lower member, an upper member,connecting bars be; veen said members, the lower member comprising asegmental flange having a circula tango depending from its inner arc andhaving a box section depending from a portion of the segmental flange, areflector mounted between the upper and the lower members and in frontof said bars, a circular base movable vertically into and out of thelower member and being formed with a box section at one side thereof,and having a lamp support, contacts mounted within the box sec-

